Method of constructing frostproof window sashes



May @54E G. T. JoHNsoN METHOD oF coNsTRucTlNc FRosTPRooF wmnow sAsHE-sFiled March 6, 1947 Patented May 8, 1951 METHOD OF CONSTRUCTINGFROSTPROOF WINDOW SASHES I('Jrunder T. Johnson, Starbuck, Manitoba,'Canada Application March 6, 1947, Serial No. 732,687 In Canada July 13,1944 1 Claim.

The invention relates to a method of constructing frost proof windows,and the general object of such method of construction is to provide afinished sash which will remain frost proof for an indefinite periodwhen in use, and will not fog or cloud under varying temperatureconditions, and in carrying out the said invention, I construct the sashin the manner hereinafter described, reference being had to theaccompanying drawing, in which Fig. 1 is a vertical sectional viewcentrally through a sash constructed in accordance with my invention,certain parts being broken away.

Fig. 2 is an interior view of the parts appearing in Fig. l.

Fig. 3 is an enlarged, detailed vertical sectional view at 3-3 in Fig.l.

Fig. 4 is an enlarged detailed vertical sectional View through thecentral rail, and indicating the applied coatings.

Fig. 5 is an end view of the lower corner of the sash, and showing themanner in which the mortice and tenon joints are glued together.

In the drawing like characters of reference indicate corresponding partsin the several gures.

In carrying out my improved method of constructing a frost proof windowsash I proceed in the following manner. The upper and lower rails I and2 of the sash and the central rail 3, if such there be, are all providedwith tenons II at their ends, which are received within mortices 5provided in the stiles 6 to form the frame. Care must be taken toeffectively glue, as indicated at 6' and with waterproof glue, thecontacting faces of the rails and stiles and also the tenons inthemortices and seasoned lumber should be used to form the frame. Thisgluing ensures against penetration of moisture at the corners and drylumber avoids warping, cracks and such like developing. The rails andstiles are also formed to provide matching beads or moulding 'lcentrally on the inner side of the frame, which beads serve to space theglass panes 8 and 9 subsequently introduced.

When the frame has been so formed and put together, the inner surfacethereof is given a coat of linseed oil, followed with two coats ofpaint, such being best indicated by the heavy line ID in Figs. 3 and 4.This treatment effectively fills the wood pores and prevents moisturefrom penetrating through the wood and into the air space between theglasses when the latterare installed and it also prevents the oil orsimilar material in the adhesive material or putty later used, frompenetrating into the frame and thereby deteriorating the adhesive incourse of time.

One of the glass panes, say the inner one 8, is then put in place, andits edge is embedded, all around, in a putty base I I, having propertiessuch that it is waterproof and does not dry out. This material is firstput in between the glass and the mouldings and between the glass and therails and finally a quantity is placed at the outer side of the glass,this prior to putting the finishing wooden strips I2 in place andnailing them to the rails and stiles. The finishing strips are undercutat the inner side, as shown at I3, and this forms with the glass andframe a triangular space receiving the material (putty) last referredto, and gives a neat interior finish.

Having progressed this far, it is now necessary that the rest of thework be done under special humidity conditions, and I have found that aspecial work-room where the temperature is maintained around 86 F. andthe .humidity gauge reading is around 15% is most satisfactory. Withsuch a room condition maintained there will be no detrimental moisturein the air space reserved between the glasses of my subsequentlycompleted sash. l

To complete the sash, the outer glass pane 9 (or panes) are put in placein the special work room, and this is accomplished by embedding theedges of the pane (or panes), all around, in a putty base Ill of thesame type as that II and in the same manner, and then applying a finalputty strip I5 for exposure to the weather, this latter putty being thatmost commonly used and called glaziers putty.

When the sash has been so completed it will be found that it is frostproof and will not cloud through freezing. Penetration of air ormoisture into the air space I6 between the panes of glass is positivelyprevented by my method of construction, and such method of constructionalso insures that the air in the sealed air space has a very lowmoisture content, so low that it Will not cause any clouding or foggingof the glass under any temperature condition.

While I have described certain part of the work being carried on in awork-room, under specific conditions, it will of course be understoodthat the whole work can be done in the special work-room if desired.

What I claim as my invention is:

The method of effectively preventing condensation between two panes ofglass separated by a continuous vbead passing around the in terior of asubstantially rectangular, Wooden, sash frame formed from frame membersmorticed at the corners, which consists in treating the mortices jointswith Waterproof glue, and the inner surface of the frame first withlinseed oil and then with a coat of paint, then glazing the first panein position against one side of the bead and finally glazing the secondpane in position against the other side of the bead in a workroom Wheretherelative humidity of the air is maintained not greater than 15percent at a temperature of approximately 86 degrees Fahrenheit. GUNDERT. JOHNSON.

4 REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 532,043 Fagan Jan. 8, 18951,725,664 Mitchell et al. Aug. 20, 1929 2,064,530 Gelstharp et al. Dec.15, 1936 2,143,747 Watkins Jan. 10, 1939 2,145,930 Herron Feb. 7, 19392,235,680 Haven et al. Mar. 18, 1941

